Marc Gomes

Gideon, Hotchner and their team reopen the unsolved case of a serial killer who has attacked someone for the first time in 20 years.

Dexter has to act quickly when Hannah tells him Elway is staking out the airport.

Scully and Skinner use info from the Lone Gunmen in their search of Mulder.

Scully, Skinner and Doggett track the shapeshifting alien bounty hunter.

Lyta, Franklin and Garibaldi help Sheridan escape; Ivanova attacks Earth destroyers; Sheridan returns to Babylon 5.

In the middle of the announcement of her new National Security Advisor, Anthony Prado, Mac is caught off guard by breaking news of a terrorist smuggling explosives across the Canadian border. The way in which Mac and her Attorney General deal with the situation pits them squarely against each other, and Nathan Templeton takes great pleasure in publicly second-guessing Mac's every move. Meanwhile, it's Halloween, and Amy - who desperately wants to go trick-or-treating like a normal kid - is disappointed to learn that, due to security concerns, she may have to settle for a party this year instead. And when Rod as First Gentleman finds himself fodder for late-night comics, it hits son Horace especially hard.